Newmarket option for Tigris River Galway Hurdle hero Tigris River could switch back to the Flat for the Betfred Cesarewitch at Newmarket. Joseph O'Brien's charge claimed his third successive victory in a thrilling renewal of the Ballybrit feature a month ago under Barry Geraghty, his fifth victory over hurdles overall. He has run just five times on the level, most recently winning at the Curragh in June, and while connections are not committing to future targets, a trip across the water on October 14 is in the melting pot. O'Brien said: " We've not made any firm plans, but we have a couple of options. "There's a race for him at Tipperary at the start of October (Istabraq Hurdle) and he's also in the English Cesarewitch. "He has the entry (at Newmarket), so it's an option. It's good to leave our options open. "He's in good form." Another O'Brien-trained and JP McManus-owned gelding who shone at Galway was the progressive Le Richebourg. The four-year-old son of Network extended his unbeaten record over jumps to three with an impressive display and O'Brien hopes there is more to come. "He had a little break after Galway as he'd had three runs in a fairly short space of time," the trainer added. "He seems in good form and there's also a race for him at the same Tipperary meeting in October, but we'll see how we go. "We're thinking of keeping him on the go during the winter, so we're in no great rush with him."